Typewriter



Aug. 2, 1938.

w. TQBlAs TYPEWRITER Filed Dec. 2s, 19:55 2 sheets-sheet 1 IIx w. ToBlAsTYPEWRITER Filed Deo. 25. 1935 2 Sheets-Sheet 2 .attorney- 'PatentedAug. 2, 193s UNITED STATES PATENT oFFlcE TVYPEWRITER ApplicationDecember z3, 1935, serial No. 55,793 In Germany February 8, 1934 6Claims.

The invention relates to calculating typewriters provided with fixedtotalizing mechanisms, in which the entire calculating mechanlsmincluding the totalizing mechanisms is located in a casing separatelyfrom the body of the typewriter, the casing serving as a stand for thetypewriter. Hitherto, the controlling movement for the totalizingmechanisms of such machines has been effected by adjustable ridersmounted l0 on the paper carriage or by interchangeable stop rails, themovement being transmitted to the calculating mechanism b y a system ofrods. 'I'he number of rod connections on the typewriter increases withthe number of the totalizing mechanisms and with the devices acting incoordination with the totalizing mechanisms.

The problem of theinvention is to establish between the typewriter partand the calculator part an at all times dissoluble connection consistingof a single member and suitable for a number of totalizing mechanisms,so that except for the attachment of a connecting member to thetypewriter carriage, no alterations or additions are necessary on thetypewriter for the 5 purpose of controlling the totalizing mechanisms.

The invention is applicable to machines of the kind described in PatentNo. 1,776,800, but is not confined to such application.

According to the invention the desired result is secured by providing apinion to slide under the action of a single driver along a spindlemounted on the calculator part in accordance with the movements of thepaper carriage, the

pinion being rotated with the spindle at prescribed positions, asuitable guide rail; this rotational movement is transmitted by thespindle to a control plate for automatically controlling the totalizingmechanisms.

'I'he control plate is preferably provided as a templet and the rodsactuating the totalizing mechanism are fitted with feeler pins whichderive the setting position from the templet. Templets and co'ntrolplates are known in connection with calculating machines but not withthe mechanism hereinbefore described.

The invention is diagrammatically illustrated, by way of example, in theaccompanying drawings, in which:

Figure 1 is a side elevation of the machine, all the parts not requiredfor the understanding of the invention being omitted.

Figure 2 is a plan of the under portion of the machine, the typewriterportion being removed.

Figure 3 shows the sliding pinion on an en- (Cl. 23S-59) larged scale,with vthree views oi the guide rail.

Figure 4 is a comparative of a form and of the corresponding guide rail.

Figures 5 and 6 represent two diierent templets.

Figure 7 shows the engagement of the feeler pins in the templet, and

Figure 8 is a section through the base-plate of the calculating machinewith the actuating rods.

Secured to the frame of the typewriter carriage I (Figure 1) is aconnector 2 which extends downwardly beyond the rear part of the machineand terminates at its lower end in a flat member or driver 3 engaging inan annular groove 4 (Figure 2) of the pinion 5. The pinion 51s slidablymounted on a spindle-here shown as a squared spindle G-so that it isconstrained to follow all the movements of the paper carriage I. Thespindle 6 is rotatably mounted in two bearing eyes 'I and 8 on the lowercasing 9 of the machine, which also houses the rest of the calculatingmechanism. On the casing 9 below the spindle 6 and parallel therewith isalso secured a rail I4 having a chamfered edge directed towards thecentre of the spindle and tting closely into the teeth of the pinion 5,which it restrains from rotation so long as this straight line guidanceremains. In order to enable the pinion 5 and thus the spindle 6 to setthe calculating mechanism into operation in known manner by means ofcams, rods and the like, the rail I4 is provided with tooth-like camswhich may-as shown in Figure 3--be formed as separate members I1 ofidentical form, tted in corresponding recesses I6 in the rail I4. Inorder to obtain proper sliding contact-and not merely pointcontact-surfaces, the pinion 5 is preferably formed as a worm wheel, andthe cams are formed with sloping surfaces to correspond with theinclined teeth of the pinion 5. The oisetmend of the cam is displacedexactly to the circular pitch of the teeth of the pinion, so that afterthe oiset portion Ila of the cam has been traversed, the rail I4 whichsubsequently acts as a guide once more bears against the flattened partsof the worm wheel on both sides of the tooth space as shown in Figure 3.vThe guide rail I4 also projects a little beyond the offset end of thecam I'I so that for a short distance both guide members are inoperation, as at 5a and 5b, and can also ensure that a rapid transitionshall not cause overspeeding. The cams I1 are provided at all desiredoperating positions and the rail I4 together with the cams areinterchangeably provided, being disposed at different distances.

secured in this case for example by knurled nuts il (Figure 2) Figure 4clearly shows the juxtaposition of a printed form and the correspondingguide rail il, so that a cam contour I1 is provided at each change overto another calculation column. 'I'he first column (old balance. debit)is determined by a basic setting oi' the reversing wheels of thecalculating mechanism. The parts are protected against damage and dirtfor the full travel of the worm pinion by a cover plate Il (Figure l).

'I'he further transmission of the control movement from the drivermember 3, and the spindle I. to the operative wheels of the calculatingmechanism is eifected not as heretofore by means oi cams and rodconnections but by means of a perforated templet (Figures 5 and 6), hereshown by way of example as a circular plate I2. I'he plate i2 bears(Figure 2) against a transmission ring il mounted on the spindle 0 andis set and secured in the correct position by means of two pins Il andthe milled nut i3. The templet i2 is provided with variously disposedholes (Figures 5 and 6) engaged by feeler pins 2li (Figure 2). The pins2li are slidably mounted in a plate I! on the member 'I of the casing soas to be movable towards and away from the templet i2 and arearticulated at their rear end on the long transmission levers 22 bymeans of pins 2l. The levers 22 are pivotally mounted on the pins 24 ina slotted member 2l at the side of the casing 9 and in turn engage withtransversely disposed push bars 2l, 20a suitably mounted in the frontpart of the casing, in such a manner that in accordance with the depthto which the pins penetrate into the holes in the templet, the bars 20and Ila-and with them the operative wheels of the calculating mechanism.as will be hereinafter described-are correspondingly moved. 'I'heconnection between the push bars 28. 28a, and the levers 22 isestablished by means of heads 21, in the slots of which engage the pins28 secured to the ends of the respective levers. The distance betweenthe pivotal pins 2l and the pins 20 is not the same for all in order toobtain the same operative strokes with the push bars 2l and 2la In orderto utilise the pin 20 for several key positions its width is stepped inseveral stages 20a and 20h (Figure 7) corresponding to the dineringdimensions of the holes Ila, I2b of the templet i2 (Figures 5 and 8). Inthis way, three different positions of engagement of the templet areobtained, as will be clear from Figure 7. A perforation symbol istherefore provided. on the templet I2, for each setting renderedpossible by the pitch of the teeth of the worm pinion. and the desiredoperative connections are marked out in the order in which they are tobe applied. To facilitate the selection and interchanging of thetemplets they are provided with markings,v (the narrow 5I in Figures 5and 6) on the rim, which markings must be set opposite a correspondingmarking on the casing when the paper carriage is in its extremerighthand position. The additional holes I2 in the templet are disposedin accordance with the setting pins I i hereinbeiore referred to and atdiiferent distances from the central axis so as to makev it impossiblefor the templet to be mounted with the reverse side to the ring I0.

It will be understood that the holes and symbols for a number of smalleroperations may be combined on a single templet and with this object inview several markings indicating the corresponding printed forms areFigure 6.

The three positions in which the feeler pins can be set correspond tothe three positions of the usual simple reversing mechanism shown'inFigure 8. The member 2l is the spindle that extends throughout thecalculating mechanism (not shown in this ilgure). It is provided ofsquare section to carry the actual change pinion u, which is moved bymeans of a driver member u secured to the push bar 2l and engaging inthe annular groove Il in the pinion Il, the member 32 passing through agap Il in the base plate Il (which may be integral with the lower casingI) of the calculating machine. 'I'he indicated position of the pinion 3lis the non-calculating position, whereas when in the two positionsindicated by the intermediate pinions ll and I1, the wheel transmits thesubtracting or adding rotational movement to the spindle (not shown)driving the adding mechanism which is disposed to the rear. It will beunderstood that in the converse case, the spindle 2| can also serve toactuate the totalizing mechanism, and-the two pinions Il and Il beconnected to the spindle of the calculating mechanism without any changein the operative conditions. An operative-pinion mechanism of this kindwith a push bar 2l is provided for each independently operatedtotalizer. The pressure of a spring Il against the adjusting ring 2lforces each push bar in the direction in which the feeler pin 20 tendsto penetrate the holes of the templet provided as shown in Thewithdrawal of the feeler pins 2l out of the holes in the templet I2 iseffected by an added movement produced in this case. for example. bydepressing one of the decimal tabulator keys Il of the typewriter. Theordinary arrangement of the typewriter tabulator device is assumed to beknown, and is therefore not described and illustrated. In thecalculating typewriter an angular member Il mounted to rock on thespindle Il (Figure 1) extends beneath all the tabulator levers (Figure2). At about the mid-position of the front part of the angular member alink Il is suspended which connects it with the outer end of a doublelever I4 (Figure 8). The lever u is mounted on the base plate Il andcarries an arm Il which is bent downwards at right angles and is of sucha width that it engages over all the adjusting rings 2l of the push bars2l, 2id. A tension spring ll tends to urge all the mechanism 4l, 46, M,40 into a neutral position in which the upper edge of the angular memberIl bears lightly against the lower edges of all the tabulatoi levers 4lwhilst at the same time the cranked arm ll is in contact with the freesurface of the rings 2l as shown in Figure 8. Consequently depressingany of the tabulator keys causes the angular member 48 to swingdownwards and so to press the rod mechanism against the action of thesprings 3i. It neutralizes the action of the springs and by means of theadjusting rings forces the push bars 2l, 28a and the operative rods Handthe feeler pins 20 back into the original position. `The templet isthereby released and the paper carriage can at the same time spring intothe position set for it by the action of the tabulator stop. A releasekey, for example, similar to that provided for the return of thecarriage, may also be provided for the release of the feeler pinswhenever required.

After the general preparations have been made' for all entries of thesame kind by inserting or exchanging the templet I2, and the carriage ofthe typewriter is in position on the extreme right. the wholecalculating operation proceeds in the following manner: y

In order to reach the ilrst calculating columnfor example the debitcolumn, old balance" on the form shown in Figure 4-the tabulator keycorresponding to the decimal position is struck.

' By means of the attached rod mechanism 46, 44,

4II the angular member 43 presses the adjusting rings 29, the push bars23, 28a and operative rods 22 out of their position, and thereby drawsthe feeler pins 20 out of the.holes in the templet I2. At the instantthe tabulator key is fully depressed, the paper carriage travels withoutany restriction and without turning the worm pinion out of the positionoccupied up to the first tabulator stop. On the tabulator key beingreleased the feeler-pins accompanied by the rod mechanism drawn back bythe springs 3| and 4I, move forward and drop into their allotted holesin the templet. Where there are no holes, the feeler pins rest on thesurface of the templet-the addition position-whilst where they encounterholes they penetrate into th'e templet as far as the shoulders 20a or2IIb and assume `the position for subtraction or non-calcu1ation.`According to requirements those parts of the templet where there are notholes may be selected as representing the non-calculating position bysuitably arranging the shift pinions 34, 36 and 31 shown in Figure 8with their sequence in the axial direction changed. By the action of therod mechanism 20, 22, 28, 28a, 32 all the shift wheels 34 are broughtinto the corresponding concordant operative positions, which they retainthroughout the carrying out of the calculation.

When it is desired to pass to the next columnthe credit column, oldbalance"-the corresponding tabulator key is depressed. The feeler pinswithdraw from the'templet at once in the manner hereinbefore described.When the key is right down the carriage is again free to move. The wormpinion turns through the distance of one tooth as the result of beingtraversed along thevadjacent cam I1 by the action of the connector 2 anddriver 3. This rotation is transmitted to the spindle 6 and from thelatter to the templet I2. 'I'he templet I2 is moved into the nextposition, determined by the travel of the worm pinion on the straightsection of the guide rail I4, and on the tabulator key being releasedthe feeler pins 2D again engage in accordance with the particularsetting of the calculating wheels. At each new,tabulated settingtherefore the feeler pins withdraw, allow free passage to the carriageand then by penetrating the templet set the wheels of the calculatingmechanism. 'Ihe movement of the carriage thus merely turns the wormpinion 5 with the attached templet I2 and is practically unaffected by aresistance set up in operating the mechanism.

Any positions that are to be left blank in tabulating can be skipped byagain tapping the tabulator key. Moreover, 4an interchange of the guiderail for the Worm wheel is not necessarily entailed by a change in theprinted forms employed. On the contrary the full width of the writingspace in the sections concerned can be allocated to the positions thatare operative. It will however be understood that in the case of suchpositions as are not required for the work in hand no holes will beprovided in the templet.

The mechanism according to the invention may be employed universallywith all types of typewriter provided With tabulator keys, since only asingle connectionrepresented by the connector 2 is necessary between thepaper carrlageof the machine and the mechanism according to theinvention. The connector 2 may be of a shape to accord with the designof the particular machine. The nature of the calculating unit is of noimportance. As an example of machine to which the invention may beapplied reference may be made to the Patent No. 1,776,800 beforereferred to. In the machine 'as therein described it is sufficient toprovide two feeler stations 22/23, whereas the drawings accompanying thepresent specification show four feeler stations 22/23, that is to say,for four shift positions or for four stationary counting mechanisms.'Ihe two shift positions in the construction according to thespecification referred to would replace the hand-actuated control thereprovided and represented by 22a and 22h of Figure 4. 'I'hus the sliderI5 operated by the keys II Nos. l to 9 move by way of bevel wheels thespindle 2| shown in Figure 8 of the drawings accompanying the presentspecification. According as the intermediate pinion 34 is moved by thedevice of the invention so it rotates the counting mechanism drivingspindle by means of the toothed wheel 36 directly for adding or by wayof the interposed wheel 31 in the opposite direction for subtracting. Inthe position shown in Figure 8 of the drawings accompanying the presentspecification the teeth of the wheel 34 are shown out of engagement withthe teeth of both the wheels 36 and 31. The driving spindle cannottherefore be rotated and the totalizing mechanism is disconnected in thenon-calculating position. The toothed wheel 36 would thus have to bemounted in the construction according to the prior specification in theplace of the bevel wheel 21 of Figure 16 or of the bevel wheel 21' ofFigure IBa. Thus, for each totalizing mechanism driving spindle in theprior construction, that is to say, 23a and 28a' there is assigned a setof pinions 34, 36 and 31 as shown in Figure 8 of the drawings of thepresent specification and to each set of these pinions there correspondsa rod controlled by the perforated templet.

The invention is applicable to all kinds of totalizing mechanismsaccording as the conditions of design and the operable steps will allow.It is particularly suitable for application to power driven totalizingor calculating mechanism. The movement of rotation for the calculatingoperation requires in all cases to be transmitted to the spindle 2I,while the wheel or pinion 36 requires to be mounted in all cases on thedriving spindle or actuator of the totalizing mechanism.

I claim:

1. A control device for the totalizing mechanisms of calculatingtypewriters, comprising a control element, transmission mechanismoperated from the control element for setting the state controlmechanism of the totalizing mechanism, a spindle upon which the controlelement is mounted, a pinion that is slidably but nonrotatably mountedupon the said spindle, a driving element engaging the said pinion andmoving it upon the spindle in accordance with the change of position ofthe typewriter platen carriage and a guide rail extending parallel withthe spindle, the said guide rail being provided at determined intervalswith means for rotating the pinion through a determined angular space asthe pinion moves axially.

2. A control device for the totalizing mechanism of calculatingtypewriters, comprising a con- (ifftrol templet. a yspindle upon whichthe said tempiet is set, a pinion that is slidabiy but nonrotatablymounted upon the said spindle. a driving element cnglslns the saidpinion and moving italongthespindleinaccordancewiththe changes oi'position oi the typewriter platen carriage, a guide rail extendingparallel with the spindle. the said guide rail being provided atintervals with means for rotating the pinion through a determinedangular space as the pinion moves axially, for the rotation ot thespindle to eiiect angular adjustment of the tempiet, and ieeler mentsbearing upon the templet and respec vely coupled to the selectingelements of the totalling mechanisms by which the state of the saidmechanisms is determined, the said leeler elements being set into theirrequired operative positions by the templet.

3. A control device for the totalizing mechanisins oi calculatingtypewriters, comprising a control templet having therein a number ofgroups of holes, in which groups the number and dispositions oi' theholes may vary from group to group, pinlons in each totalizing mechanismrelatively adjustable lor determining the state of thel correspondingtotalizing mechanism, a movable adjusting element for eachtotalizingmechanism for eecting the required adiustment oi the said pinions, aieeler pin for actuating each o! lsaid adjusting elements, the saidfeeler pinsbearing upon the templet and being constrained to entercorresponding holes in one ot the groups oi holes o! the templet for therequired state control setting oi the totalizing mechanisms, a spindleupon which the said templet is set.- a pinion that is slidable butnon-rotatably mounted upon the said spindle, a driving element engagingthe said pinion and moving it along the spindle in accordance with thechanges oi position of the typewriter platen carriage, and a guide railextending parallel with the spindle, the said guide rail being providedat determined intervals with means for rotating the pinion through adetermined angular space as the pinion moves axially, for the rota;

ausm

nisms oi calculating typewriters according to claim 3. having theslidably and non-rotatably mounted pinion formed as a worm wheel o!small width and with teeth which have their surfaces formed with slopingparts inclined to the plane oi the wheel and with parts which areparallel with the axis of the wheel and having the guide rail providedatintervals with removable cam elements that interrupt the operativeedge oi the guide rail and are oiiset for the purpose o! engaging thesloping part oi a tooth of the pinion and rotating the pinion, the teethoi the pinion being provided with flat surfaces which engage the guiderail up to the moment of engagement oi the sloping part oi! a tooth witha cam element.

6. A control device for the totalizing mechanisms oi calculatingtypewriters according to claim 3, in which the feeler pins have theoperative ends stepped in dimensions and the holes in the templet areprovided of correspondingly diiiering widths according to the extent ofentry of the ieeler pin into the templet that is required for theparticular setting oi the adjusting member of a determined totalizingmechanism so that the position of the said ieeler pins may result in thesetting oi the totalizing mechanisms for no calculation or for additionor for subtraction.

WERNER TOBIAS.

